The Housefly Effect and Other Nudges That Change Behavior | Brainfluence
Dec 16, 2025 · 29m
Summary
Roger Dooley interviews Eva van den Broek and Tim den Heyer, authors of *The Housefly Effect*, about how subtle environmental cues drive behavior. They discuss the "effect effect" of naming phenomena, the Dunning-Kruger effect in marketing, and political messaging simplicity. The conversation also covers the pratfall effect, the Cobra effect of unintended consequences, and the value of early behavioral insights.
Topics discussed
Sponsors: Whole Foods and HomeServe
Introduction to Eva van den Broek and Tim den Heyer
The Housefly Effect and the urinal story
The Effect Effect: Naming phenomena for impact
Dunning-Kruger effect in marketing and expertise
Political messaging, simplicity, and the But You Are Free effect
The Pratfall Effect and brand imperfections
The Cobra Effect and unintended consequences
Integrating behavioral science early in policy and business
Conclusion and resources
Listen ad-free on Castria